Configuring 802.11 parameters and Band Selection
Finding Feature Information
Your software release may not support all of the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.
Restrictions on Band
Selection, 802.11 Bands, and Parameters
-
Band-selection enabled WLANs
do not support time-sensitive applications like voice and video because of
roaming delays.
-
Band selection can be used only with Cisco Aironet 1140, 1250, 1260, 1550, 1800, 2600,
2800, 3500, 3600, 3800 series access points.
-
Mid RSSI is not supported on Cisco Aironet 1600 Series access points.
-
Band selection is not supported in Cisco Aironet 1040, OEAP 600 series access points.
-
Band selection operates only
on access points that are connected to a controller. A FlexConnect access point
without a controller connection does not perform band selection after a reboot.
-
The band-selection algorithm
directs dual-band clients only from the 2.4-GHz radio to the 5-GHz radio of the
same access point, and it only runs on an access point when both the 2.4-GHz
and 5-GHz radios are up and running.
-
You can enable both band
selection and aggressive load balancing on the controller. They run
independently and do not impact one another.
-
It is not
possible to enable or disable band selection and client load balancing globally
through the controller GUI or CLI. You can, however, enable or disable band
selection and client load balancing for a particular WLAN. Band selection and
client load balancing are enabled globally by default.
Information About Configuring Band Selection, 802.11 Bands, and Parameters
Band Selection
Band selection enables client
radios that are capable of dual-band (2.4- and 5-GHz) operation to move to a
less congested 5-GHz access point. The 2.4-GHz band is often congested. Clients
on this band typically experience interference from Bluetooth devices,
microwave ovens, and cordless phones as well as co-channel interference from
other access points because of the 802.11b/g limit of three nonoverlapping
channels. To prevent these sources of interference and improve overall network
performance, you can configure band selection on the
switch.
Band selection works by
regulating probe responses to clients and it can be enabled on a per-WLAN
basis. It makes 5-GHz channels more attractive to clients by delaying probe
responses to clients on 2.4-GHz channels. In the access point, the band select
table can be viewed by giving show dot11 band-select command. It can also be
viewed from show cont d0/d1 | begin Lru.
Note |
The WMM default configuration will not be shown in
show running-config output.
|
Band Selection
Algorithm
The band selection
algorithm affects clients that use 2.4-GHz band. Initially, when a client sends
a probe request to the access point, the corresponding client probe’s Active
and Count values (as seen from the band select table) become 1. The algorithm
functions based on the following scenarios:
-
Scenario - 1: Client RSSI (as seen from show cont d0/d1 | begin RSSI) is greater than both Mid-RSSI and Acceptable Client RSSI.
-
Dual band clients—No 2.4-GHz probe responses are seen at any time; 5-GHz probe responses are seen for all 5-GHz probe requests.
-
Single band (2.4-GHz) clients— 2.4-GHz probe responses are seen only after the probe suppression cycle.
-
After the client’s probe count reaches the configured probe cycle count, the algorithm waits for the Age Out Suppression time and then marks the client probe’s Active value as 0. Then, the algorithm is restarted.
-
Scenario - 2: Client RSSI (as seen from show cont d0/d1 | begin RSSI) lies between Mid-RSSI and Acceptable Client RSSI.
Note |
The client RSSI
value (seen as
sh cont
d0 |
begin
RSSI) is the average of the client packets received, and the
Mid-RSSI feature is the instantaneous RSSI value of the probe packets. As a
result, the client RSSI is seen as weaker than the configured Mid-RSSI value (7
dB delta). The 802.11b probes from the client are suppressed to push the client
to associate with the 802.11a band.
|
802.11 Bands
You can configure the 802.11b/g/n (2.4-GHz) and 802.11a/n (5-GHz) bands for the controller to comply with the regulatory requirements in your country. By default, both 802.11b/g/n and 802.11a/n are enabled.
When a controller is configured to allow only 802.11g traffic, 802.11b client devices are able to successfully connect to an access point but cannot pass traffic. When you configure the controller for 802.11g traffic only, you must mark 11g rates as mandatory.
802.11n
Parameter
This section provides instructions for managing 802.11n access points on your network. The 802.11n devices support the 2.4- and 5-GHz bands and offer high-throughput data rates.
The 802.11n high-throughput
rates are available on all 802.11n access points for WLANs using WMM with no
Layer 2 encryption or with WPA2/AES encryption enabled.
Note |
Some Cisco 802.11n APs may intermittently emit incorrect beacon frames, which can trigger false wIPS alarms. We recommend that you ignore these alarms. The issue is observed in the following Cisco 802.11n APs: 1140, 1250, 2600, 3500, and 3600.
|
802.11h Parameter
802.11h informs client devices about channel changes and can limit the transmit power of those client devices.
How to Configure 802.11 Bands and Parameters
Configuring Band Selection (CLI)
SUMMARY STEPS1.
configure terminal
2.
wireless client band-select cycle-count cycle_count
3.
wireless client band-select cycle-threshold milliseconds
4.
wireless client band-select expire suppression seconds
5.
wireless client band-select expire dual-band seconds
6.
wireless client band-select client-rssi client_rssi
7.
end
8.
wlan wlan_profile_name wlan_ID SSID_network_name band-select
9.
end
DETAILED STEPS | Command or Action | Purpose |
---|
Step 1 |
configure terminal
Example:
Switch# configure terminal
|
Enters global configuration mode.
|
Step 2 |
wireless client band-select cycle-count cycle_count
Example:
Switch(config)# wireless client band-select cycle-count 3
|
Sets the probe cycle count for band select.
You can enter a value between 1 and 10 for the cycle_count parameter.
|
Step 3 | wireless client band-select cycle-threshold milliseconds
Example:Switch(config)# wireless client band-select cycle-threshold 5000
| Sets the time threshold for a new scanning cycle period.
You can enter a value for threshold between 1 and 1000 for the milliseconds parameter.
|
Step 4 | wireless client band-select expire suppression seconds
Example:Switch(config)# wireless client band-select expire suppression 100
| Sets the suppression expire to the band select.
You can enter a value for suppression between 10 to 200 for the seconds parameter.
|
Step 5 | wireless client band-select expire dual-band seconds
Example: Switch(config)# wireless client band-select expire dual-band 100
| Sets the dual band expire.
You can enter a value for dual band between 10 and 300 for the seconds parameter.
|
Step 6 | wireless client band-select client-rssi client_rssi
Example:Switch(config)# wireless client band-select client-rssi 40
| Sets the client RSSI threshold.
You can enter a value for minimum dBm of a client RSSI to respond to a probe between 20 and 90 for the client_rssi parameter.
|
Step 7 | end
Example:Switch(config)# end
| Returns to privileged EXEC mode. Alternatively, you can also press Ctrl-Z to exit global configuration mode.
|
Step 8 | wlan wlan_profile_name wlan_ID SSID_network_name band-select
Example:Switch(config)# wlan wlan1 25 ssid12
Switch(config-wlan)# band-select
| Configures band selection on specific WLANs.
You can enter a value between 1 and 512 for the wlan_ID parameter.
You can enter the up to 32 alphanumeric characters for SSID_network_name parameter.
|
Step 9 | end
Example:Switch(config)# end
| Returns to privileged EXEC mode. Alternatively, you can also press Ctrl-Z to exit global configuration mode.
|
Configuring the 802.11 Bands (CLI)
You can configure 802.11 bands and parameters.
SUMMARY STEPS1.
configure terminal
2.
ap dot11 5ghz shutdown
3.
ap dot11 24ghz shutdown
4.
ap dot11 {5ghz | 24ghz} beaconperiod time_unit
5.
ap dot11 {5ghz | 24ghz} fragmentation threshold
6.
ap dot11 {5ghz | 24ghz} dtpc
7.
wireless client association limit number interval milliseconds
8.
ap dot11 {5ghz | 24ghz} rate rate {disable | mandatory | supported}
9.
no ap dot11 5ghz shutdown
10.
no ap dot11 24ghz shutdown
11.
ap dot11 24ghz dot11g
12.
end
DETAILED STEPS | Command or Action | Purpose |
---|
Step 1 |
configure terminal
Example:
Switch# configure terminal
|
Enters global configuration mode.
|
Step 2 | ap dot11 5ghz shutdown
Example:Switch(config)# ap dot11 5ghz shutdown
|
Disables the 802.11a band.
Note
| You must disable the 802.11a band before configuring the 802.11a network parameters.
|
|
Step 3 | ap dot11 24ghz shutdown
Example:Switch(config)# ap dot11 24ghz shutdown
| Disables the 802.11b band.
Note
| You must disable the 802.11b band before configuring the 802.11b network parameters.
|
|
Step 4 | ap dot11 {5ghz | 24ghz} beaconperiod time_unit
Example:Switch(config)# ap dot11 5ghz beaconperiod 500
| Specifies the rate at which the SSID is broadcast by the access point.
The beacon interval is measured in time units (TUs). One TU is 1024 microseconds. You can configure the access point to send a beacon every 20 to 1000 milliseconds.
|
Step 5 | ap dot11 {5ghz | 24ghz} fragmentation threshold
Example:Switch(config)# ap dot11 5ghz fragmentation 300
| Specifies the size at which packets are fragmented.
The threshold is a value between 256 and 2346 bytes (inclusive). Specify a low number for areas where communication is poor or where there is a great deal of radio interference.
|
Step 6 | ap dot11 {5ghz | 24ghz} dtpc
Example:Switch(config)# ap dot11 5ghz dtpc
Switch(config)# no ap dot11 24ghz dtpc
| Enables access points to advertise their channels and transmit the power levels in beacons, and probe responses.
The default value is enabled. Client devices using dynamic transmit power control (DTPC) receive the channel and power level information from the access points and adjust their settings automatically. For example, a client device used primarily in Japan could rely on DTPC to adjust its channel and power settings automatically when it travels to Italy and joins a network there.Note
| On access points that run Cisco IOS software, this feature is called world mode.
|
The no form of the command disables the 802.11a or 802.11b DTPC setting.
|
Step 7 | wireless client association limit number interval milliseconds
Example:Switch(config)# wireless client association limit 50 interval 1000
| Specifies the maximum allowed clients that can be configured.
You can configure a maximum number of association request on a single access point slot at a given interval. The range of association limit that you can configure is from one through 100.
The association request limit interval is measured between 100 to 10000 milliseconds.
|
Step 8 | ap dot11 {5ghz | 24ghz} rate rate {disable | mandatory | supported}
Example:Switch(config)# ap dot11 5ghz rate 36 mandatory
| Specifies the rate at which data can be transmitted between the controller and the client. disabled—Defines that the clients specify the data rates used for communication.
mandatory—Defines that the clients support this data rate in order to associate to an access point on the controller.
supported—Any associated clients that support this data rate may communicate with the access point using that rate. However, the clients are not required to be able to use this rate in order to associate.
rate—Specifies the rate at which data is transmitted. For the 802.11a and 802.11b bands, the data is transmitted at the rate of 1, 2, 5.5, 6, 9, 11, 12, 18, 24, 36, 48, or 54 Mbps.
|
Step 9 | no ap dot11 5ghz shutdown
Example:
Switch(config)# no ap dot11 5ghz shutdown
|
Enables the 802.11a band.
Note
| The default value is enabled.
|
|
Step 10 | no ap dot11 24ghz shutdown
Example:Switch(config)# no ap dot11 24ghz shutdown
| Enables the 802.11b band.
Note
| The default value is enabled.
|
|
Step 11 | ap dot11 24ghz dot11g
Example:Switch(config)# ap dot11 24ghz dot11g
| Enables or disables 802.11g network support.
The default value is enabled. You can use this command only if the 802.11b band is enabled. If you disable this feature, the 802.11b band is enabled without 802.11g support.
|
Step 12 | end
Example:Switch(config)# end
| Returns to privileged EXEC mode.
|
Configuring 802.11n Parameters (CLI)
SUMMARY STEPS1.
configure terminal
2.
ap dot11 {5ghz | 24ghz} dot11n
3.
ap dot11 {5ghz | 24ghz} dot11n mcs tx rtu
4.
wlanwlan_profile_name wlan_ID SSID_network_name wmm require
5.
ap dot11 {5ghz | 24ghz} shutdown
6.
{ap | no ap} dot11 {5ghz | 24 ghz} dot11n a-mpdu tx priority {all | 0-7}
7.
no ap dot11 {5ghz | 24ghz} shutdown
8.
ap dot11 {5ghz | 24ghz} dot11n guard-interval {any | long}
9.
ap dot11 {5ghz | 24ghz} dot11n rifs rx
10.
end
DETAILED STEPS | Command or Action | Purpose |
---|
Step 1 |
configure terminal
Example:
Switch# configure terminal
|
Enters global configuration mode.
|
Step 2 | ap dot11 {5ghz | 24ghz} dot11n
Example:Switch(config)# ap dot11 5ghz dot11n
|
Enables 802.11n support on the network.
The no form of the command disables the 802.11n support on the network.
|
Step 3 | ap dot11 {5ghz | 24ghz} dot11n mcs tx rtu
Example:Switch(config)# ap dot11 5ghz dot11n mcs tx 20
| Specifies the modulation and coding scheme (MCS) rates at which data can be transmitted between the access point and the client. You can set a value from 0 through 23 for the mcs tx parameter.
The no form of the command disables the MCS rates that is configured.
|
Step 4 | wlanwlan_profile_name wlan_ID SSID_network_name wmm require
Example:
Switch(config)# wlan wlan1 25 ssid12
Switch(config-wlan)# wmm require
|
Enables WMM on the WLAN and uses the 802.11n data rates that you configured.
The require parameter requires client devices to use WMM. Devices that do not support WMM cannot join the WLAN.
|
Step 5 | ap dot11 {5ghz | 24ghz} shutdown
Example:Switch(config)# ap dot11 5ghz shutdown
| Disables the network.
|
Step 6 | {ap | no ap} dot11 {5ghz | 24 ghz} dot11n a-mpdu tx priority {all | 0-7}
Example:Switch(config)# ap dot11 5ghz dot11n a-mpdu tx priority all
| Specifies the aggregation method used for 802.11n packets.
Aggregation is the process of grouping packet data frames together rather than transmitting them separately. Two aggregation methods are available: Aggregated MAC Protocol Data Unit (A-MPDU) and Aggregated MAC Service Data Unit (A-MSDU). Both A-MPDU and A-MSDU are performed in the software.
You can specify the aggregation method for various types of traffic from the access point to the clients.
The following table defines the priority levels (0-7) assigned per traffic type.
Table 1 Traffic Type Priority LevelsUser Priority
|
Traffic Type
|
0
|
Best effort
|
1
|
Background
|
2
|
Spare
|
3
|
Excellent effort
|
4
|
Controlled load
|
5
|
Video, less than 100-ms latency and jitter
|
6
|
Voice, less than 100-ms latency and jitter
|
7
|
Network control
|
You can configure each priority level independently, or you can use the all parameter to configure all of the priority levels at once. You can configure priority levels so that the traffic uses either A-MPDU transmission or A-MSDU transmission.
When you use the ap command along with the other options, the traffic associated with that priority level uses A-MPDU transmission.
When you use the no ap command along with the other options, the traffic associated with that priority level uses A-MSDU transmission.
Configure the priority levels to match the aggregation method used by the clients. By default, A-MPDU is enabled for priority level 0, 4 and 5 and the rest are disabled. By default, A-MPDU is enabled for all priorities except 6 and 7.
|
Step 7 | no ap dot11 {5ghz | 24ghz} shutdown
Example:Switch(config)# no ap dot11 5ghz shutdown
| Reenables the network.
|
Step 8 | ap dot11 {5ghz | 24ghz} dot11n guard-interval {any | long}
Example:Switch(config)# ap dot11 5ghz dot11n guard-interval long
| Configures the guard interval for the network.
|
Step 9 | ap dot11 {5ghz | 24ghz} dot11n rifs rx
Example:Switch(config)# ap dot11 5ghz dot11n rifs rx
| Configures the Reduced Interframe Space (RIFS) for the network.
|
Step 10 | end
Example:Switch(config)# end
| Returns to privileged EXEC mode. Alternatively, you can also press Ctrl-Z to exit global configuration mode.
|
Configuring 802.11h Parameters (CLI)
SUMMARY STEPS1.
configure terminal
2.
ap dot11 5ghz shutdown
3.
{ap | no ap} dot11 5ghz channelswitch mode switch_mode
4.
ap dot11 5ghz power-constraint value
5.
no ap dot11 5ghz shutdown
6.
end
DETAILED STEPS | Command or Action | Purpose |
---|
Step 1 |
configure terminal
Example:
Switch# configure terminal
|
Enters global configuration mode.
|
Step 2 | ap dot11 5ghz shutdown
Example:Switch(config)# ap dot11 5ghz shutdown
|
Disables the 802.11a network.
|
Step 3 | {ap | no ap} dot11 5ghz channelswitch mode switch_mode
Example:Switch(config)# ap dot11 5ghz channelswitch mode 0
| Enables or disables the access point to announce when it is switching to a new channel.
You can enter a 0 or 1 for the channelswitch parameter to specify whether transmissions are restricted until the actual channel switch (0) or are not restricted (1). The default value is disabled.
|
Step 4 | ap dot11 5ghz power-constraint value
Example:Switch(config)# ap dot11 5ghz power-constraint 200
| Configures the 802.11h power constraint value in a range from zero through 255.
The default value for the value parameter is 3 dB.
|
Step 5 | no ap dot11 5ghz shutdown
Example:Switch(config)# no ap dot11 5ghz shutdown
|
Reenables the 802.11a network.
|
Step 6 | end
Example:Switch(config)# end
| Returns to privileged EXEC mode. Alternatively, you can also press Ctrl-Z to exit global configuration mode.
|
Monitoring Configuration Settings for Band Selection, 802.11 Bands, and Parameters
Monitoring Configuration Settings Using Band Selection and 802.11 Bands Commands
This section describes the new commands for band selection and 802.11 bands.
The following commands can be used to monitor band selection, and 802.11 bands and parameters the switch.
Table 2 Monitoring Configuration Settings Using Band Selection and 802.11 Bands CommandsCommand
|
Purpose
|
show ap dot11 5ghz network |
Displays 802.11a bands network parameters, 802.11a operational rates, 802.11n MCS settings, and 802.11n status information.
|
show ap dot11 24ghz network |
Displays 802.11b bands network parameters, 802.11b/g operational rates, 802.11n MCS settings, and 802.11n status information.
|
show wireless dot11h |
Displays 802.11h configuration parameters.
|
show wireless band-select |
Displays band select configuration settings.
|
Example: Viewing the Configuration Settings for 5-GHz Band
Switch# show ap dot11 5ghz network
802.11a Network : Enabled
11nSupport : Enabled
802.11a Low Band : Enabled
802.11a Mid Band : Enabled
802.11a High Band : Enabled
802.11a Operational Rates
802.11a 6M : Mandatory
802.11a 9M : Supported
802.11a 12M : Mandatory
802.11a 18M : Supported
802.11a 24M : Mandatory
802.11a 36M : Supported
802.11a 48M : Supported
802.11a 54M : Supported
802.11n MCS Settings:
MCS 0 : Supported
MCS 1 : Supported
MCS 2 : Supported
MCS 3 : Supported
MCS 4 : Supported
MCS 5 : Supported
MCS 6 : Supported
MCS 7 : Supported
MCS 8 : Supported
MCS 9 : Supported
MCS 10 : Supported
MCS 11 : Supported
MCS 12 : Supported
MCS 13 : Supported
MCS 14 : Supported
MCS 15 : Supported
MCS 16 : Supported
MCS 17 : Supported
MCS 18 : Supported
MCS 19 : Supported
MCS 20 : Supported
MCS 21 : Supported
MCS 22 : Supported
MCS 23 : Supported
802.11n Status:
A-MPDU Tx:
Priority 0 : Enabled
Priority 1 : Disabled
Priority 2 : Disabled
Priority 3 : Disabled
Priority 4 : Enabled
Priority 5 : Enabled
Priority 6 : Disabled
Priority 7 : Disabled
A-MSDU Tx:
Priority 0 : Enabled
Priority 1 : Enabled
Priority 2 : Enabled
Priority 3 : Enabled
Priority 4 : Enabled
Priority 5 : Enabled
Priority 6 : Disabled
Priority 7 : Disabled
Guard Interval : Any
Rifs Rx : Enabled
Beacon Interval : 100
CF Pollable mandatory : Disabled
CF Poll Request Mandatory : Disabled
CFP Period : 4
CFP Maximum Duration : 60
Default Channel : 36
Default Tx Power Level : 1
DTPC Status : Enabled
Fragmentation Threshold : 2346
Pico-Cell Status : Disabled
Pico-Cell-V2 Status : Disabled
TI Threshold : 0
Legacy Tx Beamforming setting : Disabled
Traffic Stream Metrics Status : Disabled
Expedited BW Request Status : Disabled
EDCA profile type check : default-wmm
Call Admision Control (CAC) configuration
Voice AC
Voice AC - Admission control (ACM) : Disabled
Voice Stream-Size : 84000
Voice Max-Streams : 2
Voice Max RF Bandwidth : 75
Voice Reserved Roaming Bandwidth : 6
Voice Load-Based CAC mode : Enabled
Voice tspec inactivity timeout : Enabled
CAC SIP-Voice configuration
SIP based CAC : Disabled
SIP Codec Type : CODEC_TYPE_G711
SIP call bandwidth : 64
SIP call bandwith sample-size : 20
Video AC
Video AC - Admission control (ACM) : Disabled
Video max RF bandwidth : Infinite
Video reserved roaming bandwidth : 0
Example: Viewing the Configuration Settings for 24-GHz Band
Switch# show ap dot11 24ghz network
802.11b Network : Enabled
11gSupport : Enabled
11nSupport : Enabled
802.11b/g Operational Rates
802.11b 1M : Mandatory
802.11b 2M : Mandatory
802.11b 5.5M : Mandatory
802.11g 6M : Supported
802.11g 9M : Supported
802.11b 11M : Mandatory
802.11g 12M : Supported
802.11g 18M : Supported
802.11g 24M : Supported
802.11g 36M : Supported
802.11g 48M : Supported
802.11g 54M : Supported
802.11n MCS Settings:
MCS 0 : Supported
MCS 1 : Supported
MCS 2 : Supported
MCS 3 : Supported
MCS 4 : Supported
MCS 5 : Supported
MCS 6 : Supported
MCS 7 : Supported
MCS 8 : Supported
MCS 9 : Supported
MCS 10 : Supported
MCS 11 : Supported
MCS 12 : Supported
MCS 13 : Supported
MCS 14 : Supported
MCS 15 : Supported
MCS 16 : Supported
MCS 17 : Supported
MCS 18 : Supported
MCS 19 : Supported
MCS 20 : Supported
MCS 21 : Supported
MCS 22 : Supported
MCS 23 : Supported
802.11n Status:
A-MPDU Tx:
Priority 0 : Enabled
Priority 1 : Disabled
Priority 2 : Disabled
Priority 3 : Disabled
Priority 4 : Enabled
Priority 5 : Enabled
Priority 6 : Disabled
Priority 7 : Disabled
A-MSDU Tx:
Priority 0 : Enabled
Priority 1 : Enabled
Priority 2 : Enabled
Priority 3 : Enabled
Priority 4 : Enabled
Priority 5 : Enabled
Priority 6 : Disabled
Priority 7 : Disabled
Guard Interval : Any
Rifs Rx : Enabled
Beacon Interval : 100
CF Pollable Mandatory : Disabled
CF Poll Request Mandatory : Disabled
CFP Period : 4
CFP Maximum Duration : 60
Default Channel : 11
Default Tx Power Level : 1
DTPC Status : true
Call Admission Limit : 105
G711 CU Quantum : 15
ED Threshold : -50
Fragmentation Threshold : 2346
PBCC Mandatory : Disabled
Pico-Cell Status : Disabled
Pico-Cell-V2 Status : Disabled
RTS Threshold : 2347
Short Preamble Mandatory : Enabled
Short Retry Limit : 7
Legacy Tx Beamforming setting : Disabled
Traffic Stream Metrics Status : Disabled
Expedited BW Request Status : Disabled
EDCA profile type : default-wmm
Call Admision Control (CAC) configuration
Voice AC
Voice AC - Admission control (ACM) : Disabled
Voice Stream-Size : 84000
Voice Max-Streams : 2
Voice Max RF Bandwidth : 75
Voice Reserved Roaming Bandwidth : 6
Voice Load-Based CAC mode : Enabled
Voice tspec inactivity timeout : Enabled
CAC SIP-Voice configuration
SIP based CAC : Disabled
SIP Codec Type : CODEC_TYPE_G711
SIP call bandwidth : 64
SIP call bandwith sample-size : 20
Video AC
Video AC - Admission control (ACM) : Disabled
Video max RF bandwidth : Infinite
Video reserved roaming bandwidth : 0
Example: Viewing the status of 802.11h Parameters
Switch# show wireless dot11h
Power Constraint: 0
Channel Switch: 0
Channel Switch Mode: 0
Example: Verifying the Band Selection Settings
The following example displays band select configuration:
Switch# show wireless band-select
Band Select Probe Response : per WLAN enabling
Cycle Count : 2
Cycle Threshold (millisec) : 200
Age Out Suppression (sec) : 20
Age Out Dual Band (sec) : 60
Client RSSI (dBm) : -80
Client Mid RSSI (dBm) : -80
Configuration Examples for Band Selection, 802.11 Bands, and Parameters
Examples: Band Selection Configuration
This example shows how to set the probe cycle count and time threshold for a new scanning cycle period for band select:
Switch# configure terminal
Switch(config)# wireless client band-select cycle-count 3
Switch(config)# wireless client band-select cycle-threshold 5000
Switch(config)# end
This example shows how to set the suppression expire to the band select:
Switch# configure terminal
Switch(config)# wireless client band-select expire suppression 100
Switch(config)# end
This example shows how to set the dual band expire for the band select:
Switch# configure terminal
Switch(config)# wireless client band-select expire dual-band 100
Switch(config)# end
This example shows how to set the client RSSI threshold for the band select:
Switch# configure terminal
Switch(config)# wireless client band-select client-rssi 40
Switch(config)# end
This example shows how to configure band selection on specific WLANs:
Switch# configure terminal
Switch(config)# wlan wlan1 25 ssid12
Switch(config-wlan)# band-select
Switch(config)# end
Examples: 802.11 Bands Configuration
This example shows how to configure 802.11 bands using beacon interval, fragmentation, and dynamic transmit power control:
Switch# configure terminal
Switch(config)# ap dot11 5ghz shutdown
Switch(config)# ap dot11 24ghz shutdown
Switch(config)# ap dot11 5ghz beaconperiod 500
Switch(config)# ap dot11 5ghz fragmentation 300
Switch(config)# ap dot11 5ghz dtpc
Switch(config)# wireless client association limit 50 interval 1000
Switch(config)# ap dot11 5ghz rate 36 mandatory
Switch(config)# no ap dot11 5ghz shutdown
Switch(config)# no ap dot11 24ghz shutdown
Switch(config)# ap dot11 24ghz dot11g
Switch(config)#end
Examples: 802.11n Configuration
This example shows how to configure 802.11n parameters for 5-GHz band using aggregation method:
Switch# configure terminal
Switch(config)# ap dot11 5ghz dot11n
Switch(config)# ap dot11 5ghz dot11n mcs tx 20
Switch(config)# wlan wlan1 25 ssid12
Switch(config-wlan)# wmm require\
Switch(config-wlan)# exit
Switch(config)# ap dot11 5ghz shutdown
Switch(config)# ap dot11 5ghz dot11n a-mpdu tx priority all
Switch(config)# no ap dot11 5ghz shutdown
Switch(config)#exit
This example shows how to configure the guard interval for 5-GHz band:
Switch# configure terminal
Switch(config)# ap dot11 5ghz dot11n
Switch(config)# ap dot11 5ghz dot11n mcs tx 20
Switch(config)# wlan wlan1 25 ssid12
Switch(config-wlan)# wmm require\
Switch(config-wlan)# exit
Switch(config)# no ap dot11 5ghz shutdown
Switch(config)# ap dot11 5ghz dot11n guard-interval long
Switch(config)#end
This example shows how to configure the RIFS for 5-GHz band:
Switch# configure terminal
Switch(config)# ap dot11 5ghz dot11n
Switch(config)# ap dot11 5ghz dot11n mcs tx 20
Switch(config)# wlan wlan1 25 ssid12
Switch(config-wlan)# wmm require\
Switch(config-wlan)# exit
Switch(config)# ap dot11 5ghz shutdown
Switch(config)# ap dot11 5ghz dot11n rifs rx
Switch(config)#end
Examples: 802.11h Configuration
This example shows how to configure the access point to announce when it is switching to a new channel using restriction transmission:
Switch# configure terminal
Switch(config)# ap dot11 5ghz shutdown
Switch(config)# ap dot11 5ghz channelswitch mode 0
Switch(config)# no ap dot11 5ghz shutdown
Switch(config)#end
This example shows how to configure the 802.11h power constraint for 5-GHz band:
Switch# configure terminal
Switch(config)# ap dot11 5ghz shutdown
Switch(config)# ap dot11 5ghz power-constraint 200
Switch(config)# no ap dot11 5ghz shutdown
Switch(config)#end
Additional References for 802.11 Parameters and Band Selection
Related Documents
Related Topic |
Document Title |
System management commands |
System Management Command Reference, Cisco IOS XE Release 3SE (Cisco WLC 5700 Series)
|
Standards and RFCs
Standard/RFC |
Title |
None |
—
|
MIBs
MIB |
MIBs Link |
All supported MIBs for this release. |
To locate and download MIBs for selected platforms, Cisco IOS
releases, and feature sets, use Cisco MIB Locator found at the
following URL:
http://www.cisco.com/go/mibs
|
Technical Assistance
Description |
Link |
The Cisco Support website provides extensive online resources,
including documentation and tools for troubleshooting and
resolving technical issues with Cisco products and technologies.
To receive security and technical information about your
products, you can subscribe to various services, such as the
Product Alert Tool (accessed from Field Notices), the Cisco
Technical Services Newsletter, and Really Simple Syndication
(RSS) Feeds.
Access to most tools on the Cisco Support website requires a
Cisco.com user ID and password.
|
http://www.cisco.com/support
|
Feature History and Information For Performing 802.11 parameters and Band Selection Configuration
Release |
Feature Information |
Cisco IOS XE 3.2SECisco IOS XE 3.3SECisco IOS XE 3.3SE |
This feature was introduced. |